In a sneak peek at Sunday's season 14 premiere, Kim and Kourtney Kardashian travel to Cleveland to visit Khloe Kardashian, who spends much of her time with NBA boyfriend, Tristan Thompson.
The sisters are interrupted by a news alert about Caitlyn's then-unreleased memoir, The Secrets of My Life.
'It says in Caitlyn's book Robert Kardashian knew O.J. Simpson was guilty, but joined the defense tam to get back at his re-marreid ex,' reads Kim, 36. 'Robert told Caitlyn in secret after the O.J. murder trial that he believed his friend was guilty.;
'That's not true!' Khloe interrupts. 'Like, what?'
'Like, to sell a book, you're gonna make something up?' Says Kourtney.
'Dad so believed in him,' Kim says. 'It's so shady that Caitlyn came over and gave me the book, and then on the phone said, 'Well the final version has a few more things in it, but don't worry, it's nothing about you.' So she lied to me, because that is about me, if it's about our dad.'
She continues, 'I have always had Caitlyn's back,' she tells her sisters. 'But she is a liar. She is not a good person.'